| Seiyuu | Role |
| Nozomu Sasaki | Chihaya |
| Kazuhiko Inoue | Kagetsuya |
| Kaneto Shiozawa | Dr. Ashiya |
| Megumi Ogata | Elvira (Episode 3) |
| Hikaru Midorikawa | Messiah (Episode 3 & 4) |
| Masashi Hirose | Hyman (Episode 2) |
| Shou Hayami | Seraphim (Episode 2) |
| Saeko Shimazu | Aya (Episode 2) |
| Hirotaka Suzuoki | Miyagi (Episode 2) |
| Rei Sakuma | Blair (Episode 2) |
| Shigeru Nakahara | Cliff / Sapphire (Episode 2) |
| Nobuo Tobita | Hoshino (Episode 1) |
| Juurouta Kosugi | K-001 (Episode 1) |
| Shou Hayami | Taki (Episode 1) |
| Shou Hayami | Louie (Episode 2) |